ASICS GT-2000 15 vs Novablast 6: Did ASICS Turn Its Stability Shoe Into a Bounce Shoe?

The ASICS GT-2000 has been the go-to stability trainer for years. Version 15 just launched ($150 US MSRP) — but ASICS's own update notes read like a bounce-shoe pitch: "a softer landing", "a bouncier ride". So I put it head-to-head against the bounce shoe itself, the Novablast 6 ($155): weight, firmness, rebound, grip, and real runs in both. Is the GT-2000 15 still a stability shoe? ▼ Measured results (US men's 7.5 / UK 6.5 / EU 40.5 / JP 25.5 cm, one shoe) ・Weight: GT-2000 15 232.0 g (8.2 oz) / Novablast 6 223.0 g (7.9 oz) ・Heel firmness (Shore C): 30.5 / 30.5 — identical ・Rebound (steel-ball drop, heel): 41 cm / 43 cm ・Grip (same slab, same angle): a tie ・Stability on the run: GT-2000 15 — and the reason is the outsole rubber on the inner edge Home measurements with consumer tools. Treat them as a comparison between shoes, not lab data. ▼ Chapters 0:00 Is this update OK? (GT-2000 15 vs Novablast 6) 0:31 Who I am 0:43 The verdict up front 1:03 Unboxing the GT-2000 15 1:37 ASICS's five shoe types 2:06 The stability line: Kayano / GT-2000 / GT-1000 2:29 What is pronation? 2:57 ASICS's official update notes 3:24 Specs side by side 3:44 Test 1: Weight (232 g vs 223 g) 4:17 Test 2: Firmness (30.5 vs 30.5!) 4:44 Test 3: Rebound (41 cm vs 43 cm) 5:19 Test 4: Grip 5:33 On the run: fit, cushioning, stability 6:01 Why it's stable: the inner edge of the outsole 6:33 Which one should you buy? 7:04 Summary 7:34 Outro ▼ Price & availability ・GT-2000 15: $150 US MSRP (asics.com/us) — US launch August 2026 ・Novablast 6: $155 US MSRP (asics.com/us) — US launch July 2026 ・Reviewed pair: bought at retail in Japan (I'm based in Japan) ▼ Sources ・ASICS press release, GT-2000 15 (Japan, 2026): https://prtimes.jp/main/html/rd/p/000... ・ASICS press release, Novablast 6 (2026): https://corp.asics.com/jp/press/artic... ・US prices: asics.com/us product pages ・GT-2000 15 stack/drop (retailer spec): https://runningshoedb.com/en/shoes/as... ▼ About this channel I'm Karibu. Now I buy, measure and run in shoes, and report what the numbers say. Based in Japan, reviewing for runners everywhere. ▼ Disclosure ・Both pairs bought with my own money. No sponsorship. ・Firmness/rebound figures are my own home tests, repeated the same way in every video. #ASICS #GT200015 #Novablast6 #RunningShoes #ShoeReview #StabilityShoes #RunningShoeReview #KaribuRunningShoesReviews #marathon #running